72161208 has 48 divisors (see below), whose sum is σ = 223357680. Its totient is φ = 20617344.

The previous prime is 72161203. The next prime is 72161227. The reversal of 72161208 is 80216127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72161203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71085 + ... + 72092.

It is an arithmetic number, because the mean of its divisors is an integer number (4653285).

Almost surely, 2^72161208 is an apocalyptic number.

It is an amenable number.

72161208 is an abundant number, since it is smaller than the sum of its proper divisors (151196472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72161208 is a wasteful number, since it uses less digits than its factorization.

72161208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143196 (or 143189 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 72161208 is about 8494.7753354636. The cubic root of 72161208 is about 416.3270203499.

The spelling of 72161208 in words is "seventy-two million, one hundred sixty-one thousand, two hundred eight".